Question 1: Can I add more cameras to this system? You can add more. 8MP, 5MP, or 2MP POE Bullet or dome cameras. But the total number of cameras connected to the NVR should not exceed 16. This PoE NVR only supports ZOSI WiFi Camera with a particular model (Ethernet Cable Connection). Question 2: How to get the 4K 8.0MP resolution? (1) The NVR of this system is 4K resolution, but the cameras in this system are 5mp resolution, you would need to add the 4K resolution cameras to get the 4K resolution. (2)Please make sure that your TV monitor is 4K or better than 4K resolution, and connect the NVR to your TV monitor. (3) Setup the system, and go to Main Menu- Set up-Basic to change the “Video Output” to “3840 2160″ manually. The default setting of the NVR is 1024 x 768. If the monitor resolution is lower than 4K, then the system will not show the 4K resolution. PoE Installation-One cable only, easier than ever. With only a single ethernet cable connecting each IP camera to the NVR for both power and video transmission. PoE (Power over Ethernet) security system allows you to DIY the camera position anywhere you want. No need of a separate power adapter for power supply of each camera, truly freeing you from messy and tiring cablings. 5MP Super HD Viewing Experience. Super HD 5MP IP camera with a pixel resolution of 2560 x 1920, nearly 2.4X of 1080p full HD (1920 x 1080px). Bring You to a Whole New Viewing Experience. The quality of the image is related to where you installed this camera. Better to install cameras in a position with a wide field of vision, and the best outdoor installation height is 4-8 meters. The direction of the lens should avoid the angle facing the light source as much as possible. The installation environment should avoid a high dust environment as much as possible. 120ft Night Vision, Give You an Owl Eye to Penetrate the Darkness. Gone through the darkness? 5MP camera not only captures sharp and vibrant images in daytime. But also sees and records everything clearly enough at night. (Up to 120ft night vision in total darkness and 160ft Night vision in ambient light). All Weather Security Camera-Keep an Eye Inside and Out. With the durable metal camera housing, no matter in the torrential rain day or freezing cold snow weather. Under no circumstances will the powerful IP66 weatherproof camera can be ever defeated. Customized Motion Detection-Deter the Real Dangers. Customized motion detection enables you to set up the specific zones you need to obtain motion alerts from. Specify motion detection area in each camera to reduce the number of false alarms. And block out selected areas to grant privacy in situations. Video Search&Playback-Never Miss the important moments. 5MP camera security system enables you to select any one camera for full screen super HD playback of the pre-recorded footage. You can also search for the footage based on certain event, such as motion detection, PIR, and sensor. Whenever this 5MP security camera system detects motion in your selected spots. It will alert you with instant push notifications, emails and buzzer alarms. Easy Remote Access and Control-Set You Free From Separation Anxiety. It’s perfectly natural to get a little antsy about leaving your home for extended periods. ZOSI free Smart App/AVSS Client make it easy for you to get access and control to your cameras any time. Anywhere, from any device. Applied to Multiple Occasions.